The domain within your query sequence starts at position 1491 and ends at position 1957; the E-value for the RPT_1 domain shown below is 1.45e-251.

TRKTSAGVSSGFTSGDSSDSAGSLERVRRQRPEVLRSGSVLFGSEMEDFLATSSSSSASN
SSEESKASPGARESSLRSGVLRGSNLGVTRTRAARRKAGSVSLENGCGRKATRKRVYLSD
SDNNSVETDENLKNRKCGSSRKVLRKCAAVAASKIKLMSDAEDSSSESPCSGRKLPHRNA
SAVARKKLLHNSDDQSLKSETEELKDQNQSLLISGPHSVHNSISDSESDSDLRATRKTWN
ANGCTSHTAATCKTKSRPIESSEEDSRCHGSDHGPSSTGDPSTSGQKLRADSISEEADSE
PESSVLCKNTHLCKKAKILSDSEDCEEKCGERRGPEVEGSPVSEALREAILAPQCLSHRG
SETDVDSDGGAVREKSYSNENGSVSLENGQRRKVSRKSSSDKESNLQVTQKSPKDRSSPS
RITQRASVATDKMKLTSDAEDLSLESVCTRSKRRRKKPARFACTPTR

This is a significant internal repeat in the query protein sequence, as detected by the Prospero program.